| 摘要 |
<p>PURPOSE: To recover polyolefin from a laminate made of a polyolefin and foreign materials in such a manner that the recovered polyolefin is less deteriorated in properties and is less contaminated with foreign materials. CONSTITUTION: Polyolefin is recovered by adding water to 100 pts.wt. laminate made of a polyolefin layer and a foreign material layer selected from among water-soluble foreign substances and hydrolyzable foreign materials, placing the mixture in a pressure vessel, blowing an inert gas into the vessel, heating the entire to 200-400 deg.C to increase the pressure inside the vessel to 150-250kg/cm<2> G to thereby separate the mixture into a water phase and a polyolefin phase.</p> |
